Carbon material coated lead powder composite material and its application

A technology of carbon material coating and composite materials, which is applied in the direction of hybrid capacitor electrodes, electrical components, battery electrodes, etc., can solve the problems that carbon materials cannot be mixed evenly, the mechanical strength of the plates is not enough, and the uniformity is not good. Suppresses the occurrence of lead sulfate, improves capacitance and battery performance, and prolongs life

Active Publication Date: 2015-08-26
苏州卫优知识产权运营有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN 101969149A discloses a method of adding some carbon materials to lead powder and mixing them, and adding some hydrogen evolution inhibitors such as indium oxide, which plays a role in inhibiting hydrogen evolution. However, due to the large difference in density between carbon materials and lead, two The combination is not good, and the addition of carbon materials cannot ensure that they are evenly mixed in the lead powder
Patent CN 102074744A discloses a method in which a certain amount of lead is electrodeposited in carbon materials first to prepare a lead-carbon composite material, and then the composite material is added to lead powder and mixed, although this can improve the carbon material and lead powder. However, the mechanical strength of the plate is still far from enough, and the uniformity of the mixing of the two is not good.

Method used

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  • Carbon material coated lead powder composite material and its application
  • Carbon material coated lead powder composite material and its application
  • Carbon material coated lead powder composite material and its application

Examples

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Effect test

Embodiment 1

[0044] Take 2g of graphite, 1.5g of glucose and 0.01g of indium oxide, add 30ml of deionized water and 40ml of alcohol, stir evenly, then add 40g of lead powder, ultrasonically disperse for 30min, then move to a water bath at 80°C for heating Stir until the water and alcohol in the solution are evaporated, take out the graphite and glucose-coated lead powder, grind them, put them into a tube furnace, and carry out carbonization at 200°C for 2 hours under a nitrogen atmosphere to obtain graphite-coated lead powder composite material.

[0045] Make a lead-carbon super battery according to the weight ratio of the following materials: graphite-coated lead powder composite material 99, short fiber 0.2, barium sulfate 0.3, conductive graphite 0.5, after mixing evenly, add the total mass of the above raw materials 18%, 1.15g / ml Sulfuric acid and deionized water with 12% of the total mass of the above raw materials are mixed at 50°C. After the plate is coated, it is cured at 50°C and ...

Embodiment 2

[0047] Take 4g of glucose and 0.01g of indium oxide, add 30ml of deionized water and 40ml of alcohol, stir well, then add 40g of lead powder, ultrasonically disperse for 30min, move to a water bath at 80°C, heat and stir until steaming Dry the water and alcohol in the solution, take out the glucose-coated lead powder, grind it, put it into a tube furnace, and carry out carbonization at 200°C for 2 hours under a nitrogen atmosphere to obtain a carbon-coated lead powder composite material.

[0048] Make a lead-carbon super battery according to the weight ratio of the following materials: carbon-coated lead powder composite material 99%, short fiber 0.2, barium sulfate 0.3, conductive graphite 0.5, after mixing evenly, add the total mass of the above raw materials 18%, 1.15g / ml Sulfuric acid and deionized water with 12% of the total mass of the above raw materials are mixed at 50°C. After the plate is coated, it is cured at 50°C and relative humidity of 90-98% for 24 hours, and th...

Embodiment 3

[0050] Take 2g of graphite, 1.5g of glucose and 0.02g of indium oxide, add 40ml of deionized water and 60ml of alcohol, stir evenly, then add 50g of lead powder, ultrasonically disperse for 30min, then move to a water bath at 80°C for heating Stir until the water and alcohol in the solution are evaporated, take out the graphite and glucose-coated lead powder, grind them, put them into a tube furnace, and carry out carbonization at 200°C for 5 hours under a nitrogen atmosphere to obtain graphite-coated lead powder composite material.

[0051] Make a lead-carbon super battery according to the weight ratio of the following materials: graphite-coated lead powder composite material 99, short fiber 0.2, barium sulfate 0.3, conductive graphite 0.5, after mixing evenly, add the total mass of the above raw materials 18%, 1.15g / ml Sulfuric acid and deionized water with 12% of the total mass of the above raw materials are mixed at 50°C. After the plate is coated, it is cured at 50°C and ...

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Abstract

The invention discloses a carbon-material-coated lead powder composite material and an application thereof. The carbon-material-coated lead powder composite material is prepared by the following method: adding a carbon material, a thickening agent, a hydrogen evolution inhibiting agent, alcohol and de-ionized water into a reaction container; mixing uniformly and adding lead powder; carrying out ultrasonic dispersion and heating to remove water and alcohol so that the lead powder uniformly coats the carbon material; then utilizing a pipe type furnace to carry out sintering and carbonization under the protection of inert protection gas; and grinding and sieving to obtain the carbon-material-coated lead powder composite material. The composite material disclosed by the invention can be used as a cathode material of a lead-carbon super battery; a polar plate made of the carbon-material- coated lead powder composite material is good in mechanical strength; and meanwhile, the uniformity of the mixture of the carbon material and the lead powder can be effectively guaranteed; and the charging / discharging performance, the power density, the specific capacity and the cycle life of the battery which takes the composite material as the cathode material are improved to some extent.

Description

technical field [0001] The invention relates to a carbon material-coated lead powder composite material and its application as a negative electrode material of a lead-carbon super battery. Background technique [0002] Lead-acid batteries have made great contributions to many applications in the history of more than 100 years of development, especially in recent years, environmental pollution and energy crises have put forward new requirements for traditional energy sources, lead-acid batteries are relatively clean, The reason for less environmental pollution has been widely used in various aspects. However, its low power density and short cycle life limit its development. Especially when the battery is discharged at a high rate in a partially charged state, the accumulation of lead sulfate on the negative electrode will lead to sulfation of the negative electrode, resulting in a cycle life of the lead-acid battery that is much lower than its potential life. Therefore, it ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/57H01M4/62H01G11/46H01G11/30
CPCY02E60/10
Inventor 郑华均陈城勇邸婧
Owner 苏州卫优知识产权运营有限公司
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